US 12,335,470 B2
Directional cross component filter for video coding
Mohammed Golam Sarwer, San Mateo, CA (US); and Yan Ye, San Mateo, CA (US)
Assigned to Alibaba Group Holding Limited, Grand Cayman (KY)
Filed by ALIBABA GROUP HOLDING LIMITED, George Town (KY)
Filed on Feb. 10, 2022, as Appl. No. 17/650,576.
Claims priority of provisional application 63/154,582, filed on Feb. 26, 2021.
Prior Publication US 2022/0279176 A1, Sep. 1, 2022
Int. Cl. H04N 19/117 (2014.01); H04N 19/176 (2014.01); H04N 19/196 (2014.01); H04N 19/436 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/176 (2014.11); H04N 19/196 (2014.11); H04N 19/436 (2014.11)] 22 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
receiving a reconstructed luma block and a first reconstructed chroma block, the reconstructed luma block and the first reconstructed chroma block forming an input to a constraint directional enhancement filter;
determining a direction of the reconstructed luma block;
applying the constraint directional enhancement filter to determine a second reconstructed chroma block based on the first reconstructed chroma block and the direction of the reconstructed luma block;
decoding an encoded bit stream to determine a plurality of filter coefficients associated with a directional cross component filter with a cross shape;
determining an offset by applying the cross-shape directional cross component filter to samples of the reconstructed luma block that are along the determined direction;
adding the offset to the second reconstructed chroma block; and
generating a reconstructed video frame based on the second reconstructed chroma block.